ch 22 - lymphatic practice questions Flashcards
Lymphocytes that assist in the regulation and coordination of the immune response are __________.
helper and suppressor T cells
The largest collection of lymphoid tissue in the body is contained within the
spleen
The “first line” of cellular defense against pathogenic invasion is
phagocytes
An adaptive defense mechanism is always activated by
an antigen
Before an antigen can stimulate a lymphocyte, it must first be processed by
a macrophage
Activated B cells produce plasma cells that are specialized to
synthesize and secrete antibodies
The epitope site is the certain portion of the antigen’s exposed surface where
where the antibody atttaches
For a B cell to be activated, it must
be bound by a helper T cell at a class II MHC and bind an antigen to a surface antibody
A baby developing in the womb has __________ immunity because it receives __________ antibodies from its mother.
naturally acquired passive; IgG
When an immune response mistakenly targets normal body cells and tissues, the result is
autoimmune disorder
What is the lymphatic function of the white pulp of the spleen?
initiation of immune responses by B cells and T cells
The vaccination of antigenic materials into the body is called
artificially induced active immunity
The primary response of CD8 T cell differentiation in cell-mediated immunity is the production of
cytotoxic T cells
helper T cells activate
B cells
B lymphocytes differentiate int
memory and plasma cells
IgD
antibodies on the surface of B cells/antigen recognition
IgG
80% of all antibodies
can cross placenta
IgA
found primarily in glandular secretions such as mucus, tears, saliva and semen
IgM
first class of antibody secreted/first response
IgE
attaches to the exposed surfaces of basophils and mast cells
- allergy, anaphylaxis,
Lack of resistance is also known as:
susceptibility
What causes lymph from the small intestines to appear white?
lipids
Which portion of the lymph node does not contain any lymphatic nodules.
inner cortex
Which anti-microbial substances promote cytolysis, phagocytosis and inflammation?
complement proteins
Which does NOT induce vasodilation and permeability (increased fluid flow) to an infection site?
perforin
Which class of cells includes macrophages, B cells and dendritic cells?
antigen presenting cells
Which cells display CD4 proteins and interact with MHC Class II antigens?
helper T cells
Which leads to inflammation, enhancement of phagocytosis and lysis of microbes?
Classical and Alternative complement systems
The inability of the immune system to protect the body from a pathogen causes
immunodeficiency diseases
Natural exposure to an infectious agent leads to:
active immunity
Which class of antibodies indicates a recent invasion?
IgM
what cells are part of the body’s second line of defense?
Natural killer cells
The ability of an antigen to react specifically with the antibodies or cells it has provoked is called
reactivity
Which cell is considered to be the most important cell in the immune system?
helper T cells
what kind of immunity are vaccines
artificially active
